One of the high - paying story missions in GTA 5 is 'Caida Libre'. It rewards you with a lot of money. 'Minor Turbulence' is also a great one for getting paid well. These missions are often more difficult and complex compared to others, but that's why they offer better pay. They might involve things like chasing down targets or stealing valuable items. The more challenging the mission, the more you get paid usually.
The mission 'The Merryweather Heist' is a top - paying one in GTA 5 story. It has a great payout. Also, 'The Hotel Assassination' is known for giving a good amount of money. These missions are important parts of the story and the high pay reflects the significance of the tasks you need to complete, like infiltrating secure locations or taking out important targets.